Open AccessВлияние локальных корреляций на переход "однородный изолятор-сверхпроводник" в доменных границах фазы зарядового порядка 2D-системы со смешанной валентностью
Author(s) -
В.В. Конев,
В.А. Улитко,
Д.Н. Ясинская,
Ю.Д. Панов,
А.С. Москвин
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.11.46644.01nn
Subject(s) - condensed matter physics , valence (chemistry) , cuprate , square lattice , superconductivity , homogeneous , formalism (music) , lattice (music) , physics , phase boundary , quantum mechanics , statistical physics , phase (matter) , art , musical , acoustics , ising model , visual arts
—It is demonstrated in the (pseudo)spin S = 1 formalism that the structure of antiphase domain boundaries in the phase of charge ordering of a mixed-valence system of the Cu^1+, 2+, 3+ “triplet” type in cuprates on a two-dimensional square lattice depends to a considerable extent on on-site correlation parameter U . The results of computer modeling on large square lattices illustrate the change in the boundary structure (from a homogeneous monovalent nonconducting structure of the Cu^2+ type to a filamentary superconducting one) induced by a relatively small variation of positive U values.